_________ matters most in learning English is enough practice.

__________ we are having for dinner is not clear.

It happened ____________ the harvest was bad that year.

_____________ she is still alive is a wonder.

_____________ you did yesterday is right.

_____________ you did yesterday is right.

_____________ you did yesterday is right.

____________ it will please them is not easy to say.

看到一片片垃圾在水面漂浮，我意识到了保护环境是多么的重要啊。(三种表达)